It's most assuredly NOT a 303.RX8er wrote:Someone smarter than me will chime in I'm sure but I think that is a Greek .303.
Here's a website that has a lot of great info and I think this pertains to what you have:
http://www.surplusrifleforum.com/viewto ... 96&t=25730" onclick="window.open(this.href);return false;
303 is a rimmed cartridge and the case is noticeably shorter than 30-06. Just went out and compared the two since I hove both.
Quick google search says HXP 77 is Greek M1 surplus.